My cousin brought a MTD snow blower to me. He said he got it with no compression. The engine has the number 270-WJ. It looks like it has seen very little use. Oil looks almost new. I have never messed with a MTD engine. Not sure if there are any problems that are common to these? I was going to start with pulling the valve cover and see what the rockers look like. I did not find a parts listing for a 270-WJ a much more common engine was a 270-WU. It does not look like this engine has a compression release. I give it a pull and the engine just free spins. Anything to look for?